Up until now I have been using Entourage as my main email app on my PowerBook. Recently my company has switched over to using Mail. In addition, they are all subscribed to iCal and linked through Mail. I deleted my Entourage account and opened a Mail account. I also created a new calendar on iCal with our private server listing to publish to co-workers. I have no problem adding new events to my calendar, or seeing other workers calendars. The problem comes when I receive invites from people and try to accept or decline. Whenever I click on the icon to accept or reject an invite, it opens Entourage, not in Mail. I then get an "Entourage" calendar created on iCal that no one can see. I went into preferences in Mail...and selected Mail (2.1.3) as the default and it still opens Entourage if I try to accept or reject an invitation. Do I need to delete Entourage from my system entirely? Whats the deal? i have been trouble shooting this for hours and unfortunately, I have to use Mail as my email app with this company. Any ideas?